Modulation-valve for steam-heating systems.



MUDULATION VALVE FR ESTIIAM .HEATNG f STBMS,

APPL'IOATIN FILM JAN. Y, NWB.

Patentd Aug* 3, 1969,

sev,

6 modu UNITED 'STATES PATENT OFFICE.

EDWARD v-V. COMFORT ANI) JAMES L. FITTS, Ol" PENSAI'KEN TOWNSHIP, (AMDEN CUN'IY, NEW JERSEY, ASSG'NURS lU WARREN WEBSTER t COMPANY, A ('OltIOl-{ATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Aug.' 8, 1909.

Application mea January v, 190s. semi No. 469.600.

To all whom it may concern:

Be il known thm we, llnuzuu) ll'. ("oni-oic'r und .lunas L. Firm, citizens of the United Stilles. und residents of lelwnulieu township, county of (hunden. Stute of New Jerhave invented :lu lluproveuieui in Modnlnlion-`\7nlven for Steaua-limiting Sysleuks, of which the following' is :l Spi-nificatiou.

0m' invention hns i'oi'eroiwe to modulation vulves for steam heatingr systems, :und consists of Fortuin inipwweuieuls. which nro fully et forth in the. following specification, :nul Ahou-n in' the uecou'ipnnyiug drawings, which forni :i port' thereof.

.The object of our invention is' lo provide n Suitable eonHtriu-tmi of steam supply valve adopted for use. in bonner-(ion. with n etefunl rodi; o1' in n heutiue` system lo accurately regulate the supply of st'ezuu to the radiator to luit tho requirements of heating.

More lnlrtiuului'l'v. our objectief to provide such menne of regulation that slight vi'ninlions or increments willi respect to quaintily of the Ste-:lui supply muy lic accurately sind' intel igently controlled.

0m' iu Yention :ihm has for ile object the capacity or quickly opening the steam port to full ex ent with u minimum manipulation of the' valve Stem.

Our invention consiste in providing within the valve? body n valve' seat through whichr the steam port extends and a cum surface adjacent to the steam port, combined with a. vulve stem having fitthe bottom a 'valve pieee'adepted tothe steam"V ort inthe valve seat and urnished with n ateral extension for eoaction Vwith the com Surface for the purpose of raising the valve lpiece relatively` to its seat by turning the "u ve Stein..

Our inyention also comprehends the above features, wheneombined withu handle outside of the volvo cose-and connected throu h n packedjoint with the valve piece and r operating it, end a spring device :tor forcing the valve; piece toward its seat 1n; opposition to the ne ion of the eem surfnoo thereof.

0m.' injvention aleolcom rebonds deteilsof construction which, toget 1er with the fen.-

t-uros above s ieeifiod, Twill be better miden' stood by re eronceto the drawings, in which :d

Fi uro -1 is a vsectional eleva-tion, of il.

niente; Fig. 2 in o plenyiew of sume; Fig.

of the vulve, as' shown.

' und thereby ation velve'embodyingour miprovev o i i -thc centralization of the valve pieeez' Silr- A is the body of the .vulve and is made of any outward shape desired, the form shown, bemgou un lc valve. The body is 4provided with o. wi ve Seat B of brass or other Suitable material whichmay becrewed into a transverse diaphragm within the body The 'valve .seat is provided with n screw-threaded neck b-'which screws down into the transverse diaphragm to molte-:1 Steam tight joint therewith and yet. allow the vulve neat tobe removable. The valve sent is provided with o steam port C which may be slightly conicalat the upper end, as at c.v At n higher elevation than the sent, there is' rovided un annuler wall' D which is fiirnlsbed on its upper ed e with com shaped or stepped ortione'E w ich inert-nec gradually in heig it. Adjacent tothe cxtreme upper cmu portion, there may be provided u stop or shoulder e Vfor purpos'es to bo explained. 4To facilitate the escape of Vteam iuto the valve body after it passes between the valve sent und valve piece, apertures l muy be providedV through the rin-- nular wall I) of the valve seat.

F ie'the `valve so as to I it tight y yupon the comcal portions c of thesteam portlin the valve sea-t. This val've` piece F is connected wth'a valve stein G by which 'it may be rotated, rIt is also provided with radial arms l' which 'rest upon the ouin shaped portions E so that into the interi-or of the valve body, 'and ro vided at thetop with a. stutlin box K., e

volvo stem G 1s provided 'wit i u. handle H at the toit extends through the smiling box K=o. the

bonnet andj'terminates et the bottom inthe valve pieceF. `-`Immcd1etel above. the vulve piene, the valve stern@ xs provided with u piston M Whleh loosely fits the lower ,part o the oylindricnl'bonnet J, acts ne n. guiding means for 1g. 4- is u sectional elevation' ofv piece and is InsideconicalV rounding the valve stem and resting at, the bottom a minst the piston M and at the top against tie interior of the bonnet, 1s a coil s )ring L, the function of which is to depress t e valve stem and valve piece when not otherwise prevented by the action of the cam surface E and the radial arms I.

ln the operation of the valve above'described and illustrated in Figs. 1, 2 and 3, tbe mere rotation of the valve stem Gr will cause the arms I to mount the inclined cam surface E, and thereby imparting to the valve iiece l'r` a longitudinal motion away from tile valve seat, while at the same time rotating. The cam shaped surfaces E are formed soine\\'liat step 4ied, so that the arms I will rest at. various e evations corresponding to these stepped portions of the cam surface E. `Whe1i the valve is fully raised, the arnis l. strike the stops e to prevent acci dental sudden closing' the valve airain by passing beyond the highest stel (own to the lowest. While one cam sur ace E may be employed on the valve seat for the puroses of our'invention, nevertheless we .ire-

er to employ duplicate cam vsurfaces J as indicated more fully in Fig. 5, there being a cam sui-face E for each of 4the radial arms I l'.

Referring to Fig. 4, the general construction of the main part of the valve corresponds closely to that' already described, but in this case the valve stein G doesl not cxtend throng-h a sluiting' box at the top of the bonnet J, but'inslead is made with a V.square upper end, as at n, which lits into ating G". In this valve, the radial arms I are valve, the turnin a square socket N in a bushing G loosely lit-,ting the u )per end of the bonnet und flanged at its owe-r end so as to couine and rest` a'inst a Ipacking rin K. The operandle is secure to, the bushing shown as formed of a pin driven through the valve piece. In the operation of this of the handle H rotates the valve stem an the valve piece as before.

The rising of the valve stemdue to the e radial arms I riding up on the cam surfe-'t s.

E'causes the end n of the valve s tem to slide within the socket ,portion N of the bushing G', and thereb enable the bushing to maintain a practical y steam tight condldition in the bonnet.

It4 is evident that where great nicety isv required in 'the regulation of the steam, suclras intended to be secured by the employment of the steam valves herein described, there is a limited capacity lfor change with 'any particular ori ice 1n the valve seat, so that With the construction' of a'ilgiven valve body-and other parts, the vit ve `seal; may similar ones with the .exception of the size ofthe orifice or steam ort of the valve Seat and the Vertical thic ness of said seat be replaced by other and` above the diaphragm of the valve bod so that with a corresponding action o the radial arms l upon the cam surface E, a relatively larger steam passage will be provided and governed. Thus, for example, for a one-half inch valve, there would be pro-- vided three sizes of seats, one suitable for supplying steam for ten square feet of radiation, one for twenty square feet, and one for thirty s nare feet; and in the most perfect form, tiese different valve seats would be respectively provided with its own configuration of,cain surface VE so as to obtain the proper increments oi' opening .and the desired modulation in temperature. On

a three-quarter inch valve, the corresponding seats would furnish stein-n for forty-five square feet, sixty square feet, and seventylive square feet of radiation respectively. From these examples, it, is seen that the sanne. general body und working parts may be employed for a considerable variation in the capacity of thtl vulve by simply changing' the )articular valve seat ll thereof.

It will be noticed that, aside from the capacity for accurate adjustment for modulation, thesewalves may be employed for quick opening where u ful o enln is required; and where this alone is esiretgl, it is evident that the stepped portion feature of the cani surface E may be omitted, and the radial arms I be made to ride u ward from the low- .est position to the higiest portions of the cams before heilig arrested. 'lhe important feature of this invention lies in thc cmployment of the cam device on the valve seat, whereby the adjustment of the valve piece may be very accurate and positive, and wherebyI valve seats may be chan ed to' adapt the valve as a whole to suitI dltlerent requirements. 4

a While we prefer the construction shown as having been found by commercial practice to be excellently adapted for the purposes of our invention, we do not limit ourselves to theminor details, as these may be modified without departing from the spirit of the invention. A

Having now described our invention, what weclaim as new, and desire to secure by Letters Patent, is :f- Y

1. In a steam valve a valve body provided with a removable va veseat havlng av cam surface close to the orifice in the seat, comb' ed with a. valve piece having means to rotate it and a laterally extending portion guided upon the cam surface of the valve seat for applying power close tothe seat for raisin the valve piece relatively to the seat;

2. a steam valve, avalve body provided witha removable valve seat having a conical port and an adjacent cani surface., combined with a. conical valve piece having means to rotate it and s laterally extending portion guided upon the cam surface of the. mixe seat for raising the valve piece relatively to the seat, and a spring for depressing the valve iece and opposing the action of the laterally extending arm and cam surface.

3. In a steam valve, a Valve body provided with a removable valve seat having a cam -surface close to the oriliee of the seat, combined with a valve piece having a laterally extending portion guided upon the vcani surface of the valve seat for applying power close to the seat for raising the valve piece relatively to the seat, a spring arranged above the cam surface for depressing the valve )ieee and opposing the action of the laterally extending arm and cam surface, und a handle arranged above the valve body and upon the outside thereof adapted to rotate the valve Stem.

4. ln a steam'valve a valve body provided with a removable valve seat having a cam surface, combined with a valve ieee having means to rotate it and a lateral y extending portion guided upon the cam surface of the valve seat for raising the valve piece relatively to the seat, a central valve stem for the valve piece having a disk at its lower part near-the valve piece, a tubular bonnet secured to the valve body and having' its lower part coperating with the disk of the valve stein to guide it, steam tight means at the top of the bonnet surrounding the valve stem tnongh which the valve stem may be operated, and a spring within the bonnet for depressing the valve stein to 'canse the valve piece to close upon its seat.

5. In a steam valve, the valve bod provided with a removable cam surface a jacentA to the steam port thereof, combined with a valve piece for said steam port having a lateral arm adapt/ed to travel over the cam sur, 40 face and a conical steam controlling end adjacent to the lateral arm, and means to rotaie the valve whereby the rotation thereof: and the action of the arm upon the cam surface causes the valve piece to open the steam port. 45

6. In a valve, a removable valve seat provided with a central port and a lateral wall having a stepped cam surface, combined with a valve plece adapted to the seat and having a laterally projccti'n arm arranged 50 to travel over the cam surace and b`e retained at rest at the various stepped portions thereof.

7. A removable valve seat for a valve, consisting of a central art having an aperture 55 forming a seat, a d a surrounding part formed with two series of cam shaped surfaces arranged dialnetrically opposite and substantially concentric with the aperture.

8. A removable valve seat for a valve,eon 60 sisting of a central part having an aperture' forming a seat, and a surroundln wall part formed with two series of cam s aped surfaces arranged diametrically opposite and concentric with the aperture, and lateral 65 ports or openings through the surrounding wall part beneath the cani shaped surfaces.

In testimony of which invention, We have hereunto set our hands.

EDWARD lV. COMFORT. JAMES L. FITTS. Witnesses:

F. JOSEPH MILLER, P. Y. QUINN. 

